/////////////////////////////////////////////////////////////////////////////
// Original code from libhdfs3. Copyright (c) 2013 - 2014, Pivotal Inc.
// All rights reserved. Author: Zhanwei Wang
/////////////////////////////////////////////////////////////////////////////
//  Modifications by Kumo Inc.
// Copyright (C) Kumo inc. and its affiliates.
// Author: Jeff.li lijippy@163.com
// All rights reserved.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.
//



#include <turbo/log/logging.h>
#include <kmhdfs/client/packet.h>
#include <kmhdfs/client/packet_pool.h>

namespace Hdfs {
namespace Internal {

PacketPool::PacketPool(int size) :
    maxSize(size) {
}

std::shared_ptr<Packet> PacketPool::getPacket(int pktSize, int chunksPerPkt,
        int64_t offsetInBlock, int64_t seqno, int checksumSize) {
    lock_guard < mutex > lock(mut);
    if (packets.empty()) {
        return std::shared_ptr<Packet>(
                   new Packet(pktSize, chunksPerPkt, offsetInBlock, seqno,
                              checksumSize));
    } else {
        std::shared_ptr<Packet> retval = packets.front();
        packets.pop_front();
        retval->reset(pktSize, chunksPerPkt, offsetInBlock, seqno,
                      checksumSize);
        return retval;
    }
}

void PacketPool::releasePacket(std::shared_ptr<Packet> packet) {
    lock_guard < mutex > lock(mut);
    if (static_cast<int>(packets.size()) >= maxSize) {
        return;
    }

    packets.push_back(packet);
}

}
}
